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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * i2c tv tuner chip device driver4 * controls microtune tuners, mt2032 + mt2050 at the moment.5 *6 * This "mt20xx" module was split apart from the original "tuner" module.7 */8#include <linux/delay.h>9#include <linux/i2c.h>10#include <linux/slab.h>11#include <linux/videodev2.h>12#include "tuner-i2c.h"13#include "mt20xx.h"14 15static int debug;16module_param(debug, int, 0644);17MODULE_PARM_DESC(debug, "enable verbose debug messages");18 19/* ---------------------------------------------------------------------- */20 21static unsigned int optimize_vco = 1;22module_param(optimize_vco, int, 0644);23 24static unsigned int tv_antenna = 1;25module_param(tv_antenna, int, 0644);26 27static unsigned int radio_antenna;28module_param(radio_antenna, int, 0644);29 30/* ---------------------------------------------------------------------- */31 32#define MT2032 0x0433#define MT2030 0x0634#define MT2040 0x0735#define MT2050 0x4236 37static char *microtune_part[] = {38 [ MT2030 ] = "MT2030",39 [ MT2032 ] = "MT2032",40 [ MT2040 ] = "MT2040",41 [ MT2050 ] = "MT2050",42};43 44struct microtune_priv {45 struct tuner_i2c_props i2c_props;46 47 unsigned int xogc;48 //unsigned int radio_if2;49 50 u32 frequency;51};52 53static void microtune_release(struct dvb_frontend *fe)54{55 kfree(fe->tuner_priv);56 fe->tuner_priv = NULL;57}58 59static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency)60{61 struct microtune_priv *priv = fe->tuner_priv;62 *frequency = priv->frequency;63 return 0;64}65 66// IsSpurInBand()?67static int mt2032_spurcheck(struct dvb_frontend *fe,68 int f1, int f2, int spectrum_from,int spectrum_to)69{70 struct microtune_priv *priv = fe->tuner_priv;71 int n1=1,n2,f;72 73 f1=f1/1000; //scale to kHz to avoid 32bit overflows74 f2=f2/1000;75 spectrum_from/=1000;76 spectrum_to/=1000;77 78 tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n",79 f1,f2,spectrum_from,spectrum_to);80 81 do {82 n2=-n1;83 f=n1*(f1-f2);84 do {85 n2--;86 f=f-f2;87 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);88 89 if( (f>spectrum_from) && (f<spectrum_to))90 tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);91 } while ( (f>(f2-spectrum_to)) || (n2>-5));92 n1++;93 } while (n1<5);94 95 return 1;96}97 98static int mt2032_compute_freq(struct dvb_frontend *fe,99 unsigned int rfin,100 unsigned int if1, unsigned int if2,101 unsigned int spectrum_from,102 unsigned int spectrum_to,103 unsigned char *buf,104 int *ret_sel,105 unsigned int xogc) //all in Hz106{107 struct microtune_priv *priv = fe->tuner_priv;108 unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,109 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;110 111 fref= 5250 *1000; //5.25MHz112 desired_lo1=rfin+if1;113 114 lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);115 lo1n=lo1/8;116 lo1a=lo1-(lo1n*8);117 118 s=rfin/1000/1000+1090;119 120 if(optimize_vco) {121 if(s>1890) sel=0;122 else if(s>1720) sel=1;123 else if(s>1530) sel=2;124 else if(s>1370) sel=3;125 else sel=4; // >1090126 }127 else {128 if(s>1790) sel=0; // <1958129 else if(s>1617) sel=1;130 else if(s>1449) sel=2;131 else if(s>1291) sel=3;132 else sel=4; // >1090133 }134 *ret_sel=sel;135 136 lo1freq=(lo1a+8*lo1n)*fref;137 138 tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",139 rfin,lo1,lo1n,lo1a,sel,lo1freq);140 141 desired_lo2=lo1freq-rfin-if2;142 lo2=(desired_lo2)/fref;143 lo2n=lo2/8;144 lo2a=lo2-(lo2n*8);145 lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith146 lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;147 148 tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",149 rfin,lo2,lo2n,lo2a,lo2num,lo2freq);150 151 if (lo1a > 7 || lo1n < 17 || lo1n > 48 || lo2a > 7 || lo2n < 17 ||152 lo2n > 30) {153 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",154 lo1a, lo1n, lo2a,lo2n);155 return(-1);156 }157 158 mt2032_spurcheck(fe, lo1freq, desired_lo2, spectrum_from, spectrum_to);159 // should recalculate lo1 (one step up/down)160 161 // set up MT2032 register map for transfer over i2c162 buf[0]=lo1n-1;163 buf[1]=lo1a | (sel<<4);164 buf[2]=0x86; // LOGC165 buf[3]=0x0f; //reserved166 buf[4]=0x1f;167 buf[5]=(lo2n-1) | (lo2a<<5);168 if(rfin >400*1000*1000)169 buf[6]=0xe4;170 else171 buf[6]=0xf4; // set PKEN per rev 1.2172 buf[7]=8+xogc;173 buf[8]=0xc3; //reserved174 buf[9]=0x4e; //reserved175 buf[10]=0xec; //reserved176 buf[11]=(lo2num&0xff);177 buf[12]=(lo2num>>8) |0x80; // Lo2RST178 179 return 0;180}181 182static int mt2032_check_lo_lock(struct dvb_frontend *fe)183{184 struct microtune_priv *priv = fe->tuner_priv;185 int try,lock=0;186 unsigned char buf[2];187 188 for(try=0;try<10;try++) {189 buf[0]=0x0e;190 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);191 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);192 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);193 lock=buf[0] &0x06;194 195 if (lock==6)196 break;197 198 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);199 udelay(1000);200 }201 return lock;202}203 204static int mt2032_optimize_vco(struct dvb_frontend *fe,int sel,int lock)205{206 struct microtune_priv *priv = fe->tuner_priv;207 unsigned char buf[2];208 int tad1;209 210 buf[0]=0x0f;211 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);212 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);213 tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);214 tad1=buf[0]&0x07;215 216 if(tad1 ==0) return lock;217 if(tad1 ==1) return lock;218 219 if(tad1==2) {220 if(sel==0)221 return lock;222 else sel--;223 }224 else {225 if(sel<4)226 sel++;227 else228 return lock;229 }230 231 tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);232 233 buf[0]=0x0f;234 buf[1]=sel;235 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);236 lock=mt2032_check_lo_lock(fe);237 return lock;238}239 240 241static void mt2032_set_if_freq(struct dvb_frontend *fe, unsigned int rfin,242 unsigned int if1, unsigned int if2,243 unsigned int from, unsigned int to)244{245 unsigned char buf[21];246 int lint_try,ret,sel,lock=0;247 struct microtune_priv *priv = fe->tuner_priv;248 249 tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",250 rfin,if1,if2,from,to);251 252 buf[0]=0;253 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1);254 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);255 256 buf[0]=0;257 ret=mt2032_compute_freq(fe,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc);258 if (ret<0)259 return;260 261 // send only the relevant registers per Rev. 1.2262 buf[0]=0;263 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,4);264 buf[5]=5;265 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,4);266 buf[11]=11;267 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+11,3);268 if(ret!=3)269 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);270 271 // wait for PLLs to lock (per manual), retry LINT if not.272 for(lint_try=0; lint_try<2; lint_try++) {273 lock=mt2032_check_lo_lock(fe);274 275 if(optimize_vco)276 lock=mt2032_optimize_vco(fe,sel,lock);277 if(lock==6) break;278 279 tuner_dbg("mt2032: re-init PLLs by LINT\n");280 buf[0]=7;281 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs282 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);283 mdelay(10);284 buf[1]=8+priv->xogc;285 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);286 }287 288 if (lock!=6)289 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");290 291 buf[0]=2;292 buf[1]=0x20; // LOGC for optimal phase noise293 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);294 if (ret!=2)295 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);296}297 298 299static int mt2032_set_tv_freq(struct dvb_frontend *fe,300 struct analog_parameters *params)301{302 int if2,from,to;303 304 // signal bandwidth and picture carrier305 if (params->std & V4L2_STD_525_60) {306 // NTSC307 from = 40750*1000;308 to = 46750*1000;309 if2 = 45750*1000;310 } else {311 // PAL312 from = 32900*1000;313 to = 39900*1000;314 if2 = 38900*1000;315 }316 317 mt2032_set_if_freq(fe, params->frequency*62500,318 1090*1000*1000, if2, from, to);319 320 return 0;321}322 323static int mt2032_set_radio_freq(struct dvb_frontend *fe,324 struct analog_parameters *params)325{326 struct microtune_priv *priv = fe->tuner_priv;327 int if2;328 329 if (params->std & V4L2_STD_525_60) {330 tuner_dbg("pinnacle ntsc\n");331 if2 = 41300 * 1000;332 } else {333 tuner_dbg("pinnacle pal\n");334 if2 = 33300 * 1000;335 }336 337 // per Manual for FM tuning: first if center freq. 1085 MHz338 mt2032_set_if_freq(fe, params->frequency * 125 / 2,339 1085*1000*1000,if2,if2,if2);340 341 return 0;342}343 344static int mt2032_set_params(struct dvb_frontend *fe,345 struct analog_parameters *params)346{347 struct microtune_priv *priv = fe->tuner_priv;348 int ret = -EINVAL;349 350 switch (params->mode) {351 case V4L2_TUNER_RADIO:352 ret = mt2032_set_radio_freq(fe, params);353 priv->frequency = params->frequency * 125 / 2;354 break;355 case V4L2_TUNER_ANALOG_TV:356 case V4L2_TUNER_DIGITAL_TV:357 ret = mt2032_set_tv_freq(fe, params);358 priv->frequency = params->frequency * 62500;359 break;360 }361 362 return ret;363}364 365static const struct dvb_tuner_ops mt2032_tuner_ops = {366 .set_analog_params = mt2032_set_params,367 .release = microtune_release,368 .get_frequency = microtune_get_frequency,369};370 371// Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001372static int mt2032_init(struct dvb_frontend *fe)373{374 struct microtune_priv *priv = fe->tuner_priv;375 unsigned char buf[21];376 int ret,xogc,xok=0;377 378 // Initialize Registers per spec.379 buf[1]=2; // Index to register 2380 buf[2]=0xff;381 buf[3]=0x0f;382 buf[4]=0x1f;383 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1,4);384 385 buf[5]=6; // Index register 6386 buf[6]=0xe4;387 buf[7]=0x8f;388 buf[8]=0xc3;389 buf[9]=0x4e;390 buf[10]=0xec;391 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,6);392 393 buf[12]=13; // Index register 13394 buf[13]=0x32;395 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+12,2);396 397 // Adjust XOGC (register 7), wait for XOK398 xogc=7;399 do {400 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);401 mdelay(10);402 buf[0]=0x0e;403 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);404 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);405 xok=buf[0]&0x01;406 tuner_dbg("mt2032: xok = 0x%02x\n",xok);407 if (xok == 1) break;408 409 xogc--;410 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);411 if (xogc == 3) {412 xogc=4; // min. 4 per spec413 break;414 }415 buf[0]=0x07;416 buf[1]=0x88 + xogc;417 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);418 if (ret!=2)419 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);420 } while (xok != 1 );421 priv->xogc=xogc;422 423 memcpy(&fe->ops.tuner_ops, &mt2032_tuner_ops, sizeof(struct dvb_tuner_ops));424 425 return(1);426}427 428static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna)429{430 struct microtune_priv *priv = fe->tuner_priv;431 unsigned char buf[2];432 433 buf[0] = 6;434 buf[1] = antenna ? 0x11 : 0x10;435 tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);436 tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);437}438 439static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2)440{441 struct microtune_priv *priv = fe->tuner_priv;442 unsigned int if1=1218*1000*1000;443 unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;444 int ret;445 unsigned char buf[6];446 447 tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",448 freq,if1,if2);449 450 f_lo1=freq+if1;451 f_lo1=(f_lo1/1000000)*1000000;452 453 f_lo2=f_lo1-freq-if2;454 f_lo2=(f_lo2/50000)*50000;455 456 lo1=f_lo1/4000000;457 lo2=f_lo2/4000000;458 459 f_lo1_modulo= f_lo1-(lo1*4000000);460 f_lo2_modulo= f_lo2-(lo2*4000000);461 462 num1=4*f_lo1_modulo/4000000;463 num2=4096*(f_lo2_modulo/1000)/4000;464 465 // todo spurchecks466 467 div1a=(lo1/12)-1;468 div1b=lo1-(div1a+1)*12;469 470 div2a=(lo2/8)-1;471 div2b=lo2-(div2a+1)*8;472 473 if (debug > 1) {474 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);475 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",476 num1,num2,div1a,div1b,div2a,div2b);477 }478 479 buf[0]=1;480 buf[1]= 4*div1b + num1;481 if(freq<275*1000*1000) buf[1] = buf[1]|0x80;482 483 buf[2]=div1a;484 buf[3]=32*div2b + num2/256;485 buf[4]=num2-(num2/256)*256;486 buf[5]=div2a;487 if(num2!=0) buf[5]=buf[5]|0x40;488 489 if (debug > 1)490 tuner_dbg("bufs is: %*ph\n", 6, buf);491 492 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6);493 if (ret!=6)494 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);495}496 497static int mt2050_set_tv_freq(struct dvb_frontend *fe,498 struct analog_parameters *params)499{500 unsigned int if2;501 502 if (params->std & V4L2_STD_525_60) {503 // NTSC504 if2 = 45750*1000;505 } else {506 // PAL507 if2 = 38900*1000;508 }509 if (V4L2_TUNER_DIGITAL_TV == params->mode) {510 // DVB (pinnacle 300i)511 if2 = 36150*1000;512 }513 mt2050_set_if_freq(fe, params->frequency*62500, if2);514 mt2050_set_antenna(fe, tv_antenna);515 516 return 0;517}518 519static int mt2050_set_radio_freq(struct dvb_frontend *fe,520 struct analog_parameters *params)521{522 struct microtune_priv *priv = fe->tuner_priv;523 int if2;524 525 if (params->std & V4L2_STD_525_60) {526 tuner_dbg("pinnacle ntsc\n");527 if2 = 41300 * 1000;528 } else {529 tuner_dbg("pinnacle pal\n");530 if2 = 33300 * 1000;531 }532 533 mt2050_set_if_freq(fe, params->frequency * 125 / 2, if2);534 mt2050_set_antenna(fe, radio_antenna);535 536 return 0;537}538 539static int mt2050_set_params(struct dvb_frontend *fe,540 struct analog_parameters *params)541{542 struct microtune_priv *priv = fe->tuner_priv;543 int ret = -EINVAL;544 545 switch (params->mode) {546 case V4L2_TUNER_RADIO:547 ret = mt2050_set_radio_freq(fe, params);548 priv->frequency = params->frequency * 125 / 2;549 break;550 case V4L2_TUNER_ANALOG_TV:551 case V4L2_TUNER_DIGITAL_TV:552 ret = mt2050_set_tv_freq(fe, params);553 priv->frequency = params->frequency * 62500;554 break;555 }556 557 return ret;558}559 560static const struct dvb_tuner_ops mt2050_tuner_ops = {561 .set_analog_params = mt2050_set_params,562 .release = microtune_release,563 .get_frequency = microtune_get_frequency,564};565 566static int mt2050_init(struct dvb_frontend *fe)567{568 struct microtune_priv *priv = fe->tuner_priv;569 unsigned char buf[2];570 571 buf[0] = 6;572 buf[1] = 0x10;573 tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* power */574 575 buf[0] = 0x0f;576 buf[1] = 0x0f;577 tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* m1lo */578 579 buf[0] = 0x0d;580 tuner_i2c_xfer_send(&priv->i2c_props, buf, 1);581 tuner_i2c_xfer_recv(&priv->i2c_props, buf, 1);582 583 tuner_dbg("mt2050: sro is %x\n", buf[0]);584 585 memcpy(&fe->ops.tuner_ops, &mt2050_tuner_ops, sizeof(struct dvb_tuner_ops));586 587 return 0;588}589 590struct dvb_frontend *microtune_attach(struct dvb_frontend *fe,591 struct i2c_adapter* i2c_adap,592 u8 i2c_addr)593{594 struct microtune_priv *priv = NULL;595 char *name;596 unsigned char buf[21];597 int company_code;598 599 priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);600 if (priv == NULL)601 return NULL;602 fe->tuner_priv = priv;603 604 priv->i2c_props.addr = i2c_addr;605 priv->i2c_props.adap = i2c_adap;606 priv->i2c_props.name = "mt20xx";607 608 //priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */609 610 memset(buf,0,sizeof(buf));611 612 name = "unknown";613 614 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);615 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);616 if (debug)617 tuner_dbg("MT20xx hexdump: %*ph\n", 21, buf);618 619 company_code = buf[0x11] << 8 | buf[0x12];620 tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",621 company_code,buf[0x13],buf[0x14]);622 623 624 if (buf[0x13] < ARRAY_SIZE(microtune_part) &&625 NULL != microtune_part[buf[0x13]])626 name = microtune_part[buf[0x13]];627 switch (buf[0x13]) {628 case MT2032:629 mt2032_init(fe);630 break;631 case MT2050:632 mt2050_init(fe);633 break;634 default:635 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",636 name);637 return NULL;638 }639 640 strscpy(fe->ops.tuner_ops.info.name, name,641 sizeof(fe->ops.tuner_ops.info.name));642 tuner_info("microtune %s found, OK\n",name);643 return fe;644}645 646EXPORT_SYMBOL_GPL(microtune_attach);647 648MODULE_DESCRIPTION("Microtune tuner driver");649MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");650MODULE_LICENSE("GPL");651